Crossword Genius

A large vault blown up for the consumers in Madrid (6)

Ross

I believe the answer is:

paella

I'm a little stuck... Click here to teach me more about this clue!

'consumers in madrid' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.

'a large vault blown up for the' is the wordplay.
I cannot quite understand how this works, but
'a' is present in the answer.
'large' could be 'l' and 'l' is located in the answer.
The remaining letters 'pela' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for paella that I've seen before include "Span. rice dish" , "Al, leap into the Spanish dish" , "Dish (not English)" , "Spanish dish of rice, shellfish, etc" , "something to eat" .)

I've seen this clue in the Irish Times.
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